McLuhan studied as an undergrad at the University of Manitoba in Canada, and later did graduate work at Cambridge University, where he eventually became inspired to study media analysis. He later taught at Taught at University of Wisconsin (Madison): 1936 to 1937, and St. Louis University from 1937 until 1944. He has published over 15 books, and has given many lectures during his teaching years
"The medium is the message"
In his most famous book Understanding Media, published in 1964, McLuhan writes of the effects of media in society. He describes media as an "extension of the body", like radio is an extension of hearing, and books are an extension of sight. He says other objects have this extension as well, like the lightbulb which extends our vision in the dark. In the book, he argues that the content of media has little effect on society, but the channel of media itself has the same effect on society no matter the message.